Gas-burner.



E. H. FISHER.

GAS BURNER.

APPLIGATION FILED JAN.30, 1912.

Patented Nov. 18,1913.

E Q I l 51 g r w Q I N E i 03 d I 6 E E 4 ii A L U} r Q :0 U Q Q 1;; WITNESSES k INVENTOH w m 1 TED STATES PATENT OFFICE.

EDWIN H. FISHER, .OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 SCIllENTIFIC MATE- RIALS COMPANY, OF PIT'ISBURGH, PENNSYLVANIA, A COR ORATION OF PENN- SYLVANIA.

GAS-BURNER.

orenzo.

Specification of Letters Patent Patented Nov. 18, 1913.

To all whom it may concern iBe it' 'known that I, EDWIN H. FISHER, of

"Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented cer-' tain new and useful Improvements in Gas. Burners, of which the following is a specification.

My invention relates to a new and improved gas burner, and among theobjects of the present invention are: to provide a burner designed to produce a very hot and uniform flame; a burner constructed to provide aflame of uniform height throughout its length and of uniform intensity throughout its cross section; a burner constructed to produce a maximum area of solid flame while burning a. minimum quantity of gas; and further, a burner having means for preventing back-firing.

In the accompanying drawing, which illustrates an application of my invention, Figure 1 is a central longitudinal sectional view of a burner embodying my invention; Fig. 2, a plan; and Fig. 3, a sectional view taken on line IIL-III of Fig. 2 looking in the direction of the arrows.

Referring to the drawing, the burner comprises a casing or body portion preferably made in tubular form and consisting of a tubular member 1 and a tubular member 2.

As illustrated, member 1 is provided at one end with external threads. 3, and is adapted to be entered in an end of the tubular member 2 with the threads engaging the internal threads 4 of member 2. The opposite end of member 2. is closed. In place of makingthe body portion of two members, as illustrated, this body may consist of a single member.

As shown, the outer open end; of member 1 is provided with internally disposed threads 5, and is adapted to receive a hollow externally threaded plug 6 having its threads 7 adapted to engage the threads 5 of said member 1. Plug 6 is provided with a centrally disposed jet nozzle 8 which projects into the member 1, as clearly shown by Fig. 1.

Located in advance of the jet nozzle, I form member 1 with a series of air inlet openings 9 through which air is admitted to the interior of the casing and mixed with the gas introduced thereto through the jet nozzle 8." a

The interior of the body portion is preferably of a uniform diameter throughout its and for preventing back-firing.

length and of a sufiicient diameter to permit a thorough mixing of the gas and air and to permit of a rapid passage of the combustible mixture therethrough.

The present invention embodies coacting means for producing a maximum area of solid flame from a minimum quantity of gas -'Ihese means, as illustratedand as preferred, conslst n forming in the tubular member 2 a relatively long and rectangular shaped open- -1ng 10, bounded by upwardly projecting and longitudinally extending flanges 11 and by laterally extending flanges 12.

13 designates ledges adapted to form a seat extending entirely around the rectangular openlng. The construction just described forms a rectangular shaped offset to the tubular member 2, and located in said offset, is a grating or grid 14. -Grid 14 is preferably of substantially the same depth as the depth of the flange and is seated upon the ledges 13.

To accomplish the ends mentioned above, the means should include a metallic grid or grating as 14, having comparatively large openings so as not to impede the flow of disposed fuel supply, not shown, adapted to, be inserted in place of the plug 16, or with a vertically disposed fuel supply pipe 17.

The burner illustrated is designed for use in connection with furnaces, boilers, etc., and in Fig. 1, I have indicated a portion 18 of a wall of a furnace through which the burner is placed. In practice, the dimensions of the burner parts will vary accord ing to the number of cubic feet of gas to be burned per hour.

In order to obtain the desired combustible mixture, it is necessary that a correct proportioning of the gas and air supply should be worked out, as illustrated, it will cool, thus be noted that the air enters the mixing chamber through relatively large air inlet openings while the gas is admitted through a relatively small orifice.

What I claim is: p

1. In a gas burner, the combination of a cylindrical body member having an elongated opening interposed between the ends thereof, a flange surrounding said opening, a ledge extending around the interior of said opening, and a metallic grid or grating adapted to. seat on said ledge within said flange and having a thickness equal to the depth of said flange, substantially as set forth.

2. In a gas burner, the combination of a tubular body member having an elongated opening interposed between the ends thereof, means for supplying'gas and means for supplying'air to said body, a flange surrounding said opening, a ledge extending entirely around the interior of said opening,

a ledge extending entirely around the interior of said opening, a grid or grating adapted to rest on said ledge within said flange, said tubular body having a closed and an open end, means for supplying air,

and means for supplying gas to said tubular body through said open end, substantially as set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

EDWIN H. FISHER.

I Witnesses:

W. G. DOOLITTLE, F. E. 'GAITHER. 

